Dispensing pump



July 31, 1923. 1,463,310

J. B. DAVIS DISPENS ING PUMP Filed July 18. 1921 ATTORNEYS.

Patentd July 3i, i923.

JOEE B. DAVIB F BPBRQGE'IELD, HASSACHUSETTS, ASSIGNQE $0 '1. :5

WEACTURWG COMPANY, OF WESE srnnrerrm, 1; a.

DISPWSIHG rum.

Application filed July 18, 1921.

To all whom it may concern:

Be it known that 1, JOHN B. DAVIS, citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Dispensing Pumps, of which the following is a specification.

This invention relates to dispensing pump and more particularly to pumps for dispensing different grades or kinds of oil or other liquid.

The object of the present invention is to improve and simplify the construction and mode of operation of pumps of the abovenamed general character.

To this end one feature of the invention consists in the provision in a dispensing apparatus of a single reciprocable pump operating means capable of being selectively connected to any of a plurality o pum s.

Other objects of the invention an the features of construction by which they are attained will be apparent from the following description of the preferred embodiment of the invention illustrated in the accompanying drawings, in which Fig. 1 is a view, partially in front elevation, and partially in vertical section, of a dis ensing pump constructed in accordance wit the present invention;

Fi 2 is a detail sectional view taken on the hue 2-2 of Fig. 1; and

Fig. 3 is a vertical sectional view on an enlarged scale, of a portion of the mechanism shown in Fig. 2.

As shown in the drawings, the illustrated pump comprises a pair of vertical pum cylinders 5 and 6, their pistons 7 and 8 an piston rods 9 and 10; a pair of inlet or supply pipes 11 and 12 connecting the cylinders 5 and 6 with separate oil containers (not shown) a pair of delivery pipes 13 and 14: rising from the upper ends of said cylinders; and a single pump operating means including a vertically reciprocable rack-bar 15, which is adapted to be selectively connected with the upper ends of the pistons 7 and 8.

The various 0 erating parts of the pum are enclosed wit in a ump casing of a we known curb or roadsi e type comprising the .usual hollow standard or pedestal 16 and yoke frame 17 supported thereby, the yoke frame being provided with inclosing side doors one of which is indicated at 18. In-

serial in. 485,568.

terposed between the yoke frame 17 and the standard 16 is a horizontal header plate 20 which is conveniently made in the form of a cored castm having separate chambers 21 and 22 opening into the upper ends of the vertical pump cylinders 5 and 6 respectively.

The cylinders 5 and 6 depend in side-byside relation from the chambered header plate 20. The lower ends of the cylinders 5 and 6 are closed by a single cap plate 23 except where they communicate with the supply pipes 11 and 12. The en ply pipes are screw-threaded into the cap p ate 23 and leaddownwardly to suitable rece tacles containing liquid of difierent a es such as relatively light and heavy ldbricating oil. Suitable check valves (not shown) are associated with the Suppl pi cs 11 and 12 and are adapted to be lifted caused by the upstrokes of the pistons to admit fluid to the cylinders and to close b pressure and gravity as the pistons descen The delivery pipes 13 and 14 into which the fiuld is pumped from the cylinders 5 and 6 rise vertically between the sides of the yoke frame 17 and are screw-threaded at their lower ends into the header late 20 above the fluid outlet chambers 21 an 22 therein. The upper portions of the delivery pi es are curved to terminate in downwardly irected discharge openings which are provided with faucets 25. The pump pistons 7 and 8 are each provided with an inlet opening 26 and the usual valve 27 which closes the opening 26 on the upstroke of the piston, while the valve in the respective supply pipe is open, and which opens on the downward stroke of the piston while the valve in the respective supply pipe is closed. The piston rods'9 and 10 extend upwardly through suitable stufiing boxes 28 in the header plate 20, and the upper ex-' tremities of the piston rods are adapted to be selectively engaged by means of coupling member 30 that is carried at the lower end of the rack-bar 15.

The rack-bar 15 is the same as that ordinarily used in. dispensing pumps for reciprocating the pump piston. lhe rack-bar is reciprocated, as is generally understood, by means of a handle 31 through the intermediary of suitable caring (not shown). In accordance with t e usual custom the rackbar is adapted to rise through a suitable by the suction These quantit opening in the cross-piece at the top of the yoke frame 17 and carries at its upper end a cap 32 for sealing said opening when the rack-bar is returned toits normal or lowermost position.

To adapt the pump to deliver predetermined quantities of fluid, a plurality of quantity stops 34 are provided which are adapted to cooperatively engage a projection 35 on one side of the rack-bar 15 to limit the intake strokes of the pump pistons 7 and 8.

stops are carried by a vertical rod 36 w .ich is secured at its opposite ends in the yoke frame 17 and header plate 20, and the stops are mounted upon the rod in any suitable manner by which they may be adapted to be selectively positioned 1n the path of the projection 35.

The coupling member 30 by means of which the rack-bar may be selectively connected with the piston rods 9 and 10, consists of a horizontal rocker plate best shown in Fig. 2, which is pivotally mounted at the lower end of the rack-bar 15 and is provided with two oppositely projecting portions 38 and 39 which are notched, as indicated at 40, to receive the piston rods 9 and 10. As shown, the rack-bar has a head 41 (Fig. 3) at its lower end while depending from the head 41 is a cylindrical stud 42 which extends through a disk-like plate 43, which is confined between the head 41 and a nut 44 that is threaded upon the stud 42. The plate 43 serves to support the coupling member 30 and to this end said plate is spaced from the head 41 by means of an annular flange 45 which extends through the coupling member, the latter being confined between the head 41 and the plate 43 and being adapted to turn upon the flange 45. To facilitate the turning of the coupling member 30 a handle 46 projects radially therefrom.

The notched projection 38 of the coupling member 30 is adapted to embrace the piston rod 10, as shown in Fig. 2, while the-notched projection 38 is adapted to embrace the piston rod 9, these projections engaging between collars 47 that are severally fixed to the piston rods below the plane of the coupling member and adjustable nuts 48 that are threaded upon the piston rods above the plane of the coupling member. Thus the collars 47 serve to transmit the downward meagre thermore, the arrangement is such that while the coupling member 30 is being turned to disconnect the rack-bar from the piston rod which it engages, the other piston rod will continue to be engaged by said coupling member until just after the latter is completely disconnected from the first piston rod, thus insuring that one or the other of the piston rods will at all times be connected with the rack-bar.

As shown, the piston rods are located upon opposite sides of the rack-bar 15 and inasmuch as only one piston rod at a time is operatively connected with the rack-bar it is desirable to provide means for guiding the lower end of the rack-bar to prevent cramping of the bar in its hearings or of the piston rod in its stufiing box. To this end, the

plate 43 has depending therefrom two vertical guide-rods 50 which are located at diametrically opposite points equidistant from the center of said plate and extend freely through suitable guideways formed in the header plate 20,. The rods 50 are long enough so that they will not be retracted from the guideways in the header plate when the rack-bariis in its uppermost po sition.

The present invention affords a practical and simple solution of the problem of constructing a pump for delivering a plurality of grades of oil or other liquid. As already described, the invention is embodied in a pump .having a single reciprocable actuating means for a plurality of pump pistons which, together with their cylinders are euclosed within a single pump casing of the usual size and shape so that the exterior of the apparatus exactly resembles an oil dis pensing pump of the ordinary curb or roadside type. Since a single actuating means is employed only a single set of quantity stops is necessary to limit the strokes of both of the pump pistons. The coupling device for selectively connecting the piston rods with the actuating means is of a very practical and simple ,as ivell as durable construction and is readily shiftable with a minimum amount of effort on the part of the attendant.

A particularly important advantage of the illustrated apparatus is the fact that the two grades of oil or other liquid delivered are at all times kept entirely separate from one another there being no common passages through which both grades of oil pass before being finally delivered. Consequently in the present apparatus there is no possibility of even a slight intermingling of oil of different grades as is inevitable in most of the dispensing pumps of this character heretofore employed.

lVhile it is preferred to employ the specific construction and arrangement of parts shown and described it is to be understood that this construction and arrangement is not essential except so far as defined inthe claims and may be changed or m0d1fiedw1thout departing from the spirit of the invention.

What is claimed is:

1. In a dispensing pump, the combination with a single reciprocable pump-actuating means, of a pluralit of pump cylinders, a piston and plston rod for each cylinder, and a single member carried by the first named means and movable to engage with any one of said rods to connect the same to said actuating means. r

2. In a dispensing pump, the combination with a single reciprocable pump-actuating member, of a plurality of pump cylinders, severally adapted for connection with receptacles containing different kinds of fluid, pistons in said cylinders, rods connected with said pistons, and a member carried by said reciprocable member for selectively connecting the piston rods therewith.

3. In a dispensing pump, the combination with a single reciprocatory pump-actuating member, of a pluralit of pump cylinders adapted to be supplied with different kinds of fluid, pistons in said cylinders, rods connected with the pistons, and means carried by said reciprocable member for connecting any one of said rods therewith, said means being constructed and arranged so that one rod or another will always be connected with the actuating member.

4. In a dispensing pump, the combination with a single reciprocatory pump-actuating member, of two pump cylinders arranged with their axes parallel to each other and to the path of movement of said cylinders, rods carrying said pistons, a pair of spaced-apart abutments ad acent the outer ends of said piston rods, a coupling plate pivotally mounted upon said actuating member havin two notches formed therein one notch adapted to engage one of the piston rods between the spaced abutments thereon when the coupling plate is swung in one direction and the other notch adapted to engage the other piston rod between the abutments thereon when the coupling plate is swung in the opposite direction.

5. a dispensing pump the combination with a single reciprocating pump-actuating member, of two pump cylinders arranged with their axes parallel to each other and to the path of movement of said reciprocating member and located at opposite sides of the latter, delivery pipes leading from said cylcoupling device is rotated in one direction while the other of said projections is adapt- ,ed to engage the other piston and when the coupling device is rotated in the reverse direction, -and interengaging elements associated with each of said projections and arranged one on the projection and one on the piston rod respectively engaged thereby for interlocking said members so that the movement of the reciprocating member will be transmitted thereto.

6. In a dispensing pump the combination with a hollow pedestal, a header plate surmounting said pedestal, and a yoke frame rising from said header plate, of a plurality of pump cylinders depending from the header plate within the pedestal, means for Suppl ing difierent kinds of fluid to said cylin ersepistons in said cylinders, rods carrying sai pistons and projecting through said header plate, a rack-bar vertically reciprocable within said yoke frame, means for reciprocating the rack-bar, and a coupling member carried by the rack-bar and adapted to connect the piston rods selectively therewith.

7. In a dispensing pump the combination with a hollow pedestal, of a header plate surmounting said pedestal and having separate chambers formed at its lower side, delivery pipes rising from said chambers, a yoke frame rising from the header plate, pump cylinders depending from the header late and severally opening into said cham ers pistons in said cylinders, rods carrying said pistons and projecting through the header plate, a rack-bar vertically reciprocable within said yoke frame, means for reciprocating the rack-bar, a horizontal plate rigidly connected with lower end of the rackbar and spaced therefrom, guide-rods carried by said plate and extending througli guideways in the header plate, a coupling plate confined between said plate and the rack-bar and adapted to be turned in opposite directions to selectively connect the piston rods with the rack-bar, and a handle for turning the coupling plate.

In testimony whereof I have afiixed my signature.

sons a. me. 

